JP2004149000A - Gas cylinder device for vessel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable to raise and lower a propeller with light force and to miniaturize and simplify a switching valve device in a gas cylinder device for a vessel. <P>SOLUTION: In the gas cylinder device 20 for the vessel provided with a switching valve device 50 enabling to switch communication state among a piston rod side hydraulic chamber 25, a piston side hydraulic chamber 26, and a gas chamber 31, the switching valve device 50 has poppet valves 61-63 arranged on ports A-C opening a communication chamber 53 provided on a valve case 51, and has balls 75-77 between a ball operation surface 74 of a rotary plate 73 supported by the valve case 51 and each poppet valve 61-63, and sets and removes each poppet valve 61-63 on and from the corresponding ports A-C via the balls 75-77 by rotary operation of the rotary plate 73. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a marine gas cylinder device.
[0002]
[Prior art]
BACKGROUND ART Conventionally, as disclosed in Patent Document 1, as a marine gas cylinder device, a cylinder block is connected to one of a hull and a propulsion device, and a piston rod inserted into a cylinder block from a rod guide provided on the cylinder block is connected to the hull and the propulsion device. And a piston rod-side oil chamber on the piston rod-housing side and a piston-side oil chamber on the non-piston-rod-housing side are provided in the cylinder block so that the piston rod-side oil chamber and the piston-side oil chamber can communicate with each other. In some cases, a gas chamber is formed integrally with a cylinder block, and a switching valve device is provided in the cylinder block so as to switch a connection state between a piston rod side oil chamber, a piston side oil chamber, and a gas chamber. By connecting the piston rod-side oil chamber, the piston-side oil chamber, and the gas chamber by opening the switching valve device, the thruster can be manually tilted up / down with a light force while obtaining the assist force for applying gas pressure to the piston rod. Can be down.
[0003]
[Patent Document 1]
Tokuhei 3-1200 (3 pages, Fig. 3, Fig. 4)
[0004]
[Problems to be solved by the invention]
In the prior art of Patent Document 1, the switching valve device connects the gas chamber to the communication chamber, and closes the communication passage connecting the piston rod side oil chamber to the communication chamber by the hydraulic pressure of the piston rod side oil chamber. And a check valve which is closed by hydraulic pressure of the piston side oil chamber is provided in a communication path connecting the piston side oil chamber to the communication chamber. At this time, since the switching valve device opens and closes each check valve with a pin supported by the valve case, the switching valve device needs to have a support structure in the valve case that allows the pin to reciprocate smoothly without falling down. , Large and complicated.
[0005]
Further, in the related art of Patent Document 1, the gas chamber is directly connected to the communication chamber. Therefore, the gas cylinder device has a free piston disposed close to the piston, the piston has an absorber valve and a return valve, and when the propulsion unit collides with an obstacle and the piston and the piston rod once extend, the gas is released. The oil in the chamber opens the check valve and is replenished to the lower oil chamber of the free piston, and as a result, before and after the collision, displaces the stop position of the free piston and returns the piston rod to the cylinder block after absorbing the impact of the piston rod. Cannot be matched with the mooring position before shock absorption.
[0006]
SUMMARY OF THE INVENTION It is an object of the present invention to provide a marine gas cylinder device in which a propulsion device can be moved up and down with a light force and a switching valve device is made small and simple.
[0007]
Another object of the present invention is to prevent a stop position of a free piston from being displaced before and after a collision with an obstacle in a marine gas cylinder device.
[0008]
[Means for Solving the Problems]
According to a first aspect of the present invention, a cylinder block is connected to one of a hull and a propulsion device, and a piston rod inserted into the cylinder block from a rod guide provided on the cylinder block is connected to the other of the hull and the propulsion device. A piston rod-side oil chamber on the piston rod-housing side and a piston-side oil chamber on the non-piston-rod-housing side are provided inside, and a gas chamber that can communicate with the piston rod-side oil chamber and the piston-side oil chamber is integrated with the cylinder block. And a switching valve device provided in the cylinder block for switching a communication state between the piston rod-side oil chamber, the piston-side oil chamber, and the gas chamber is provided in the cylinder block. A check valve that closes with the oil pressure in the piston rod side oil chamber is provided in the communication path connecting the oil chamber to the communication chamber, and the piston side oil chamber is connected to the communication chamber. A check valve that closes by the oil pressure of the piston-side oil chamber is provided in the communication path involved, and a check valve that closes by the oil pressure of the gas chamber is provided in the communication path that connects the gas chamber to the communication chamber. The check valves can be opened and closed at once, and all the check valves can be opened and closed by opening all check valves, and all check valves can be closed by closing operation. Thus, all communication paths can be cut off from the communication room.
[0009]
According to a second aspect of the present invention, in the first aspect of the present invention, the switching valve device further opens a port of each communication path in a communication chamber provided in a valve case, and the check valve is provided in each of the ports of each communication path. A valve is arranged, a ball is interposed between the ball operation surface of the rotating body supported by the valve case and each of the above-described check valves, and each check valve is connected to a corresponding port via the ball by rotating the rotating body. It is made to come and go.
[0010]
According to a third aspect of the present invention, a cylinder block is connected to one of the hull and the propulsion unit, and a piston rod inserted into the cylinder block from a rod guide provided on the cylinder block is connected to the other of the hull and the propulsion unit. A piston rod-side oil chamber on the piston rod-housing side and a piston-side oil chamber on the non-piston-rod-housing side are provided inside, and a gas chamber that can communicate with the piston rod-side oil chamber and the piston-side oil chamber is integrated with the cylinder block. In a marine gas cylinder device having a switching valve device provided in a cylinder block capable of switching a communication state between a piston rod-side oil chamber, a piston-side oil chamber, and a gas chamber, the switching valve device includes a gas chamber. A non-return valve that communicates with the communication chamber and closes the piston rod-side oil chamber to the communication path that connects the piston rod-side oil chamber to the communication chamber. A check valve that closes by the oil pressure of the piston-side oil chamber is provided in the communication path that connects the piston-side oil chamber to the communication chamber, and the switching valve device enables all the check valves to be opened and closed at a time and opens. By opening all the check valves by operation, all communication paths can be communicated with each other in the communication room, and by closing all check valves by the closing operation, all communication paths are connected to the communication room. The switching valve device opens the ports of the communication paths in the communication chamber provided in the valve case, and connects the ports of the communication paths of the piston rod-side oil chamber and the communication paths of the piston-side oil chamber. Each check valve having a valve opening pressure higher than the gas charging pressure is disposed in each of the ports, and a ball is interposed between the ball operating surface of the rotating body supported by the valve case and each of the check valves. Rotation of each check valve via the ball It is obtained so as to contact and separate to the port to respond.
[0011]
According to a fourth aspect of the present invention, in the first or the third aspect of the present invention, the switching valve device further includes a ball operating surface of the rotating body and a shape of a portion of the check valve that sandwiches the ball, thereby rotating the rotating body. Accordingly, the opening / closing timing of each check valve can be adjusted.
[0012]
According to a fifth aspect of the present invention, in the first, third or fourth aspect, a thrust washer is further interposed between the valve case and the rotating body.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
1 is a schematic view showing a marine propulsion device, FIG. 2 is a sectional view showing a gas cylinder device, FIG. 3 is a side view of FIG. 2, FIG. 4 is a plan view of FIG. 2, and FIG. 6, FIG. 6 is a sectional view taken along the line VI-VI of FIG. 5, FIG. 7 is a sectional view taken along the line VII-VII of FIG. 5, and FIG. 8 is a sectional view taken along the line VIII-VIII of FIG. FIG. 9 is a hydraulic circuit diagram of the gas cylinder device.
[0014]
(1st Embodiment) (FIGS. 1-9)
As shown in FIG. 1, a marine propulsion device (an outboard motor, but may be an inboard / outboard motor) 10 has a clamp bracket 12 fixed to a hull 11, and a swivel bracket 14 substantially attached to the clamp bracket 12 via a tilt shaft 13. A propulsion unit 15 (propulsion device) is pivotally mounted on the swivel bracket 14 via a turning shaft (not shown) so as to be rotatable about a substantially vertical axis. The propulsion unit 15 drives a propeller 17 by an engine unit 16.
[0015]
The marine propulsion device 10 has a gas cylinder device 20 interposed between a clamp bracket 12 and a swivel bracket 14. The gas cylinder device 20 includes a cylinder block 21 cast from an aluminum alloy or the like, and a piston rod 22, as shown in FIGS. The piston rod 22 is liquid-tightly inserted into the cylinder block 21 via an oil seal 23C and an O-ring 23D from a rod guide 23 screwed to the cylinder block 21 via O-rings 23A and 23B. The mounting portion 21A provided at the lower end of the cylinder block 21 is connected to the clamp bracket 12, and the mounting portion 22A provided at the upper end of the piston rod 22 is connected to the swivel bracket 14.
[0016]
The gas cylinder device 20 fixes a piston 24 (O-ring 24 </ b> A) to an insertion end of a piston rod 22 inserted into a cylinder block 21, and a piston rod-side oil chamber 25 that accommodates the piston rod 22 inside the cylinder block 21. A piston side oil chamber 26 that does not house the piston rod 22 is provided, and hydraulic oil is housed in the piston rod side oil chamber 25 and the piston side oil chamber 26. Note that the piston-side oil chamber 26 accommodates a free piston 27 (O-ring 27A) disposed close to the piston 24. The free piston 27 divides the piston side oil chamber 26 into an upper piston side oil chamber 26A and a lower piston side oil chamber 26B.
[0017]
The piston 24 is provided with an absorber valve 28 and a return valve 29 in each of two flow paths connecting the piston rod side oil chamber 25 and the piston side oil chamber 26A. The absorber valve 28 opens when the pressure in the piston rod-side oil chamber 25 abnormally rises and the rising pressure reaches a predetermined pressure value or more, as under the action of an impact force due to collision with an obstacle. The oil in the piston rod side oil chamber 25 can be transferred to the upper piston side oil chamber 26A. After absorbing the impact force due to the collision with the obstacle, the return valve 29 is actuated when the pressure in the upper piston side oil chamber 26A reaches a predetermined pressure value or more under the weight of the propulsion unit 15 tilted up. The valve can be opened.
[0018]
In the gas cylinder device 20, a gas chamber 31 that can communicate with the piston rod-side oil chamber 25 and the fixie-side oil chamber 26 is formed integrally on one side of the upper part of the cylinder block 21. The gas chamber 31 additionally includes a lower oil chamber 33 via a free piston 32 (O-ring 32A).
[0019]
The gas cylinder device 20 is provided with a switching valve device 50 in the cylinder block 21 that enables the piston rod-side oil chamber 25 to switch the communication state between the piston-side oil chamber 26 and the gas chamber 31. The switching valve device 50 is provided on the upper side of the cylinder block 21 on the side opposite to the gas chamber 31.
[0020]
The gas cylinder device 20 includes a communication path 34 that connects the piston rod-side oil chamber 25 to the switching valve device 50, a communication path 35 that connects the piston-side oil chamber 26 to the switching valve device 50, and a gas chamber 31 (lower oil chamber). 33) is connected to the switching valve device 50. The switching valve device 50 is set to be switched between an off mode in which all the communication paths 34, 35, 36 are shut off from each other and an on mode in which all the communication paths 34, 35, 36 are connected to each other.
[0021]
When the switching valve device 50 is set to the off mode, the gas cylinder device 20 disconnects the communication between the piston rod side oil chamber 25, the piston side oil chamber 26, and the gas chamber 31 (the lower oil chamber 33), and The expansion and contraction is stopped, and the propulsion unit 15 is set in the tilt lock state at an arbitrary position without being affected by the gas chamber 31. In the off mode of the switching valve device 50, even when the propulsion unit 15 collides with an obstacle and the piston rod 22 and the piston 24 perform an extension operation once, the gas chamber 26B below the free piston 27 is stored in the lower piston side oil chamber 26B. 31, no oil is replenished in the lower oil chamber 33, and as a result, the stop position of the free piston 27 is not displaced before and after the collision, and the upper piston side is moved from the piston rod side oil chamber 25 through the absorber valve 28. The amount of oil flowing into the oil chamber 26A and the amount of oil returned from the upper piston side oil chamber 26A to the piston rod side oil chamber 25 via the return valve 29 become the same, and the impact of the piston rod 22 on the cylinder block 21 is absorbed. The later return position is surely matched with the stop position before absorbing the shock.
[0022]
When the switching valve device 50 is set to the ON mode, the gas cylinder device 20 connects the piston rod-side oil chamber 25, the piston-side oil chamber 26, and the gas chamber 31 (the lower oil chamber 33) to each other to extend and contract the piston rod 22. And the propulsion unit 15 can be manually tilted up / down. In the ON mode of the switching valve device 50, the gas pressure in the gas chamber 31 exerts an assisting force on the piston rod 22 to reduce the manual tilt-up / tilt-down operation force. Further, in the ON mode of the switching valve device 50, in the tilt-up stroke of the gas cylinder device 20, oil corresponding to the volume of the piston rod 22 retreating from the piston rod-side oil chamber 25 and the piston-side oil chamber 26 is moved below the gas chamber 31. The oil is supplied from the oil chamber 33 to the piston-side oil chamber 26, and the oil corresponding to the volume of the piston rod 22 that enters the piston-rod-side oil chamber 25 and the piston-side oil chamber 26 during the tilt-down stroke of the gas cylinder device 20 becomes the piston-side oil. It is withdrawn from the chamber 26 to the lower oil chamber 33.
[0023]
The gas cylinder device 20 has a temperature compensation relief valve 39 interposed in a valve insertion portion 38 provided at an intermediate portion of a communication path 37 connecting the piston side oil chamber 26 and the lower oil chamber 33 of the gas chamber 31. ing. When the operating oil temperature of the piston rod-side oil chamber 25 and the piston-side oil chamber 26 rises abnormally in the off mode of the switching valve device 50, oil in the piston-side oil chamber 26 is released from the relief valve 39 to the lower oil chamber 33. .
[0024]
In the gas cylinder device 20, (A) the structure for connecting the communication paths 34 to 37 provided in the cylinder block 21 and (B) the structure of the switching valve device 50 are as follows.
[0025]
(A) Arrangement structure of the communication paths 34 to 37 in the cylinder block 21 (FIGS. 2 to 4 and 6)
[0026]
The communication path 34 is a lateral hole provided in the cylinder block 21 and opens at the upper end of the piston rod side oil chamber 25. The communication path 34 is a short hole, and is drilled in the cylinder block 21 after casting.
[0027]
The communication path 35 includes a horizontal hole 35A, a vertical hole 35B, and a horizontal hole 35C provided in the cylinder block 21. The horizontal hole 35A opening at the lower end of the piston side oil chamber 26 and the horizontal hole 35C opening to the switching valve device 50 are short holes, and are formed by drilling the cylinder block 21 after casting. The lateral hole 35A is sealed with the plug 35D. The vertical hole 35B is an elongated hole connecting the horizontal hole 35A and the horizontal hole 35C, and is formed after the cylinder block 21 is cast.
[0028]
The communication path 36 is formed using the cylinder block 21 and the rod guide 23. At this time, the gas cylinder device 20 includes an O-ring 42A at the lower end small diameter portion 42 of the cap 41 screwed to the cylinder block 21 via the O-ring 41A. The pipe 43 is inserted into the cylinder block 21 through the through hole. The gas chamber 31, the free piston 32, and the lower oil chamber 33 are provided inside the pipe 43. 44 is a gas filling part.
[0029]
The communication path 36 includes an annular hole 36A provided in an annular hollow portion between the cylinder block 21 and the pipe 43, an oblique hole 36B provided in the cylinder block 21, an annular groove 36C provided in the rod guide 23, and a cylinder block 21. It comprises a horizontal hole 36D provided. The annular hole 36 </ b> A is a long hole, and communicates with the lower oil chamber 33 from a cutout at the lower end of the pipe 43. The oblique hole 36B is a short hole connecting the upper end of the annular hole 36A and the annular groove 36C, and is drilled in the cylinder block 21 after casting. The annular groove 36C is cut on the outer periphery of the rod guide 23. The horizontal hole 36D is a short hole connecting the annular groove 36C to the switching valve device 50, and is drilled in the cylinder block 21 after casting.
[0030]
The communication path 37 includes a horizontal hole 37A and a vertical hole 37B provided in the cylinder block 21. The lateral hole 37A is a short hole connecting the piston side oil chamber 26 to the valve insertion portion 38, and is drilled in the cylinder block 21 after casting. The valve insertion portion 38 is sealed by a plug 38A. The vertical hole 37B is a short hole connecting the valve insertion portion 38 and the lower oil chamber 33, and may be formed when the cylinder block 21 is cast, or may be drilled in the cylinder block 21 after casting.
[0031]
Therefore, in the gas cylinder device 20, the long hole formed at the time of casting the cylinder block 21 is only the vertical hole 35B of the communication path 35. Further, since the gas chamber 31 is formed by the drawing pipe 43, the free piston 32 can be accommodated without processing the pipe 43.
[0032]
(B) Structure of the switching valve device 50 (FIGS. 5 to 9)
The switching valve device 50 has a valve case 51 integrally formed on the upper side of the cylinder block 21 on the side opposite to the gas chamber 31 as described above, and the valve case 51 is provided with a liquid through an O-ring 52A. A cap 52 is tightly screwed and provided, and an internal space of the valve case 51 is a communication chamber 53.
[0033]
The switching valve device 50 accommodates the valve guide 54 and the spacer 55 in the valve case 51, fits the valve guide 54 into the fitting protrusion 56 of the valve case 51, positions and stops the valve guide 54, and caps the valve guide 54 and the spacer 55. It is fixed at 52. Alternatively, the spacer 55 may be formed integrally with the cap.
[0034]
As shown in FIG. 9, the switching valve device 50 is a three-way valve. Ports A, B, and B of each of the communication paths 34, 35, and 36 provided in the valve case 51 are provided at positions facing the communication chamber 53 in the valve guide 54. C is open. The switching valve device 50 closes the port A of the communication path 34 that connects the piston rod side oil chamber 25 to the communication chamber 53 by the hydraulic pressure of the piston rod side oil chamber 25 (from the piston rod side oil chamber 25 to the communication chamber 53). A poppet valve 61 (to block the flow of oil) is provided, and the port B of the communication path 35 connecting the piston-side oil chamber 26 to the communication chamber 53 is closed by the hydraulic pressure of the piston-side oil chamber 26 (communicated from the piston-side oil chamber 26). A poppet valve 62 for preventing the flow of oil to the chamber 53 is provided, and the gas chamber 31 (the lower oil chamber 33) is connected to the port C of the communication path 36 that connects the gas chamber 31 (the lower oil chamber 33) to the communication chamber 53. A poppet valve 63 is provided that closes (blocks the flow of oil from the gas chamber 31 (lower oil chamber 33) to the communication chamber 53) by the hydraulic pressure of the above.
[0035]
The switching valve device 50 includes guide holes 64, 65, 66 that match the respective ports A to C in the valve guide 54, and O-rings 57 to 59 provided on the outer circumference of the end surfaces of the guide holes 64 to 66. The poppet valves 61 to 63 are provided in the respective guide holes 64 to 66 so as to be linearly movable in a state of being in close contact with the seat surface 51A of the case 51. Each of the poppet valves 61 to 63 constitutes a check valve of the present invention, and seal members 61B to 63B provided on the outer end surfaces of the valve bodies 61A to 63A are seated on the valve seats 64A to 66A of the respective guide holes 64 to 66. To close each port A to C, release the ports, and open each port A to C. The valve guide 54 is provided with holes 64B and 66B opening to the communication chamber 53 at the center of each of the valve seats 64 to 66A. The valve spring 67 interposed between the rear surfaces of the poppet valves 61 to 63 and the seat surface 51A of the valve case 51 improves the response of the valve elements 61A to 63A, but may not be provided.
[0036]
However, the switching valve device 50 allows all the poppet valves 61 to 63 provided on the valve guide 54 to be simultaneously opened and closed in the present embodiment. By opening all the poppet valves 61 to 63 by the opening operation, the ports A to C of all the communication paths 34 to 36 can communicate with each other in the communication room 53, and all the poppet valves 61 to 63 are closed by the closing operation. By closing, the ports A to C of all the communication paths 34 to 36 can be shut off from the communication room 53.
[0037]
For this reason, the switching valve device 50 inserts the rotation shaft 71 supported by the valve case 51 into the cap 52 in a liquid-tight manner via the O-ring 71A, and a rotation operation lever 72 at the outer end of the rotation shaft 71. The rotating shaft 71 is pivotally attached to a bearing recess provided on the seat surface 51A, and the rotating plate 73 is integrated with the rotating shaft 71 via a spring pin 71B.
[0038]
The switching valve device 50 sandwiches the balls 75 to 77 between the ball operating surface 74 (the recess 74A or the like) of the rotating plate 73 and the outer end surfaces of the valve bodies 61A to 63A of the poppet valves 61 to 63. The popping valves 61 to 63 are brought into contact with and separated from the valve seats 64A to 66A of the corresponding ports A to C via the balls 75 to 77 by the rotation operation of the above. Each of the balls 75 to 77 is loosely inserted and held in each of the holes 64B to 66B of the valve guide 54. When the balls 75 to 77 come off from the recesses 74A of the ball operating surface 74 of the rotating plate 73 due to the rotation of the rotating plate 73, the poppet valves 61 to 63 are pushed down by the balls 75 to 77, and the poppet valves 61 to 63 are opened at a time. .
[0039]
The switching valve device 50 has a click ball 82 backed up by a moderation spring 81 on a part of the end face of the valve guide 54 facing the rotary plate 73 in the circumferential direction. A closed position corresponding hole 83A and an open position corresponding hole 83B are provided at two places separated in the circumferential direction of the plane of the rotating plate 73. When the rotation lever 72 is rotated until it abuts against the stopper 51A on the closing side of the valve case 51 (FIG. 3), when the closing position corresponding hole 83A of the rotating plate 73 engages with the click ball 82 of the valve guide 54, the rotating plate is rotated. 73 is set to the closing operation position (the lower half of FIG. 8). When the rotation operation lever 72 is rotated until it abuts against the opening-side stopper 51B of the valve case 51 (FIG. 3), when the opening position corresponding hole 83B of the rotation plate 73 engages with the click ball 82 of the valve guide 54, the rotation plate 73 is set to the opening operation position.
[0040]
Accordingly, the switching valve device 50 rotates the rotary plate 73 integrated with the rotary shaft 71 by the rotary operation lever 72, and (a) when the rotary plate 73 is positioned at the closing operation position, the ball operating surface 74 of the rotary plate 73 Of the poppet valves 61-63 by the balls 75-77 is released, and the poppet valves 61-63 are seated on the valve seats 64A-66A of the corresponding ports A-C. Then, the ports A to C are closed, and all the communication paths 34 to 36 are shut off, so that the above-described off mode is set (the lower half of FIG. 6).
[0041]
On the other hand, the switching valve device 50 operates the rotation plate 73 integral with the rotation shaft 71 by the rotation operation lever 72, and (b) when the rotation plate 73 is positioned at the open operation position, the plane of the rotation plate 73 is changed to the balls 75 to By depressing 77, the poppet valves 61 to 63 are separated from the corresponding valve seats 64 to 66A of the ports A to C, the ports A to C are conducted to the communication chamber 53, and all the communication paths 34 to 36 are connected. The above-mentioned ON mode for communication with each other is set (the upper half of FIG. 6).
[0042]
In addition, the switching valve device 50 adjusts the shape of the ball operating surface 74 (the recess 74A or the like) of the rotating plate 73 and the outer end surfaces of the valve bodies 61A to 63A of the poppet valves 61 to 63 with the balls 75 to 77 interposed therebetween. The opening / closing timing of each poppet valve 61 to 63 in accordance with the rotation operation of the rotating plate 73 can be adjusted. For example, in the process of setting the switching valve device 50 to the ON mode, the recess 74 </ b> A of the ball operating surface 74 in contact with the ball 77 corresponding to the poppet valve 63 becomes shallow (or flat), and the ball corresponding to the poppet valves 61 and 62. When the depression 74A of the ball operating surface 74 where the contact surfaces 75 and 76 are deepened, the poppet valve 63 of the port C of the gas chamber 31 (the lower oil chamber 33) opens first, and then the piston rod side oil chamber 25 and the piston side. The poppet valves 61 and 62 of the ports A and B of the oil chamber 26 are opened.
[0043]
Further, the switching valve device 50 includes a thrust washer 91 between the rotating plate 73 and the cap 52 of the valve case 51 and a thrust washer 92 between the rotating plate 73 and the valve guide 54, thereby forming the rotating plate 73. Smooth rotation can be achieved.
[0044]
According to the present embodiment, the following operations are provided.
{Circle around (1)} The switching valve device 50 is configured such that the poppet valves 61 to 63 are disposed inside the valve case 51 via balls 75 to 77 sandwiched between the ball operating surface 74 of the rotating plate 73 and the poppet valves 61 to 63. Open and close. The arrangement of the balls 75 to 77 is simple and easy to assemble, and there is no need to provide a special support structure in the valve case 51, so that the switching valve device 50 can be made compact and simple.
[0045]
(2) By providing a recess 74A at the opening / closing operation end of the rotating plate 73 between the ball operating surface 74 of the rotating plate 73 and the balls 75 to 77 of the poppet valves 61 to 63, a sense of moderation of the opening / closing operation (click Feeling), and the necessity of separately providing a moderation feeling mechanism such as the click ball 82 can be eliminated, and the switching valve device 50 can be simplified.
[0046]
(3) The communication chamber 53 becomes a closed space by the closing operation of the switching valve device 50. That is, each of the poppet valves 61 to 63 constituting the switching valve device 50 is closed by the pressure of the piston rod-side oil chamber 25, the piston-side oil chamber 26, or the gas chamber 31, and is kept closed even when the pressure increases. The communication room 53 is a closed space. When the hydraulic oil in the communication chamber 53 expands due to an abnormal rise in temperature, the hydraulic pressure in the communication chamber 53 becomes high. This high-pressure oil opens one of the check valves and blows naturally (low pressure). As a result, the poppet valve 63 corresponding to the gas chamber 31 blows) As a result, it is not necessary to provide a relief valve mechanism for temperature compensation in the communication chamber 53 in order to prevent breakage of the switching valve device 50 and the like. Can be simplified.
[0047]
(4) By closing the switching valve device 50, the gas chamber 31 is shut off from the communication chamber 53, and the oil in the gas chamber 31 is not sucked into the communication chamber 53. Accordingly, the gas cylinder device 20 has a free piston 27 disposed close to the piston 24, the piston 24 has an absorber valve 28 and a return valve 29, and the propulsion unit 15 collides with an obstacle and the piston 24 and the piston rod Even when the cylinder 22 is once extended, the oil in the gas chamber 31 opens the poppet valve 63 and is not replenished to the piston-side oil chamber 26 below the free piston 27. As a result, before and after the collision, the free piston 27 Is not displaced. The return position of the piston rod 22 with respect to the cylinder block 21 after absorbing the shock can be matched with the stop position before absorbing the shock.
[0048]
(5) The opening and closing timing of each of the poppet valves 61 to 63 can be adjusted by adjusting the shape of the portion between the ball operating surface 74 of the rotating plate 73 and the balls 75 to 77 of each of the poppet valves 61 to 63. For example, the depth of the recess 74A provided in the ball operating surface 74 of the rotating plate 73 is adjusted, the poppet valve 63 corresponding to the gas chamber 31 is opened first, and then the other poppet valves 61 and 62 can be opened. .
[0049]
{Circle around (6)} By disposing a thrust washer 91 between the valve case 51 (cap 52) and the rotating plate 73, frictional displacement between the rotating plate 73 and the valve case 51 (cap 52) is prevented, and generation of abrasion powder is prevented. Thus, the rotation of the rotating plate 73 can be performed smoothly. A similar effect is obtained by the thrust washer 92 interposed between the valve guide 54 and the rotating plate 73.
[0050]
(2nd Embodiment)
The difference between the gas cylinder device 20 of the second embodiment and the gas cylinder device 20 of the first embodiment is that a poppet valve 63 provided in a communication path 36 that connects the gas chamber 31 (lower oil chamber 33) to the communication chamber 53. Is removed, and the gas chamber 31 (the lower oil chamber 33) is directly connected to the communication chamber 53. The valve opening pressure of the poppet valves 61 and 62 provided in the communication paths 34 and 35 connecting the piston rod side oil chamber 25 and the piston side oil chamber 26 to the communication chamber 53 is higher than the gas filling pressure of the gas chamber 31. Set.
[0051]
In the gas cylinder device 20 of the second embodiment, only two poppet valves, ie, the poppet valves 61 and 62, are used, and the valve opening pressure of the poppet valves 61 and 62 is higher than the gas filling pressure of the gas chamber 31 by the valve springs 67. By setting, even if an obstacle collides with the propulsion unit 15 when the poppet valves 61 and 62 are in the closed state, the poppet valve 62 does not open, and the gas chamber 31 is always in the communication chamber 53. Even if they are in communication, no oil flows into the piston rod side oil chamber 25 and the piston side oil chamber 26, and the free piston 27 does not move.
[0052]
According to the gas cylinder device 20 of the second embodiment, the same operation as the above-mentioned (1) to (6) in the first embodiment can be achieved only by using the two poppet valves 61 and 62.
[0053]
As described above, the embodiments of the present invention have been described in detail with reference to the drawings. However, the specific configuration of the present invention is not limited to the embodiments, and there may be a design change or the like without departing from the gist of the present invention. This is also included in the present invention. For example, in the embodiment of the present invention, the check valve is not limited to the poppet valve.
[0054]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to this invention, in a marine gas cylinder apparatus, while making a propulsion machine up / down with a light force, a switching valve apparatus can be made small and simple.
[0055]
Further, according to the present invention, in the marine gas cylinder device, the stop position of the free piston can be prevented from being displaced before and after the collision with the obstacle.
[Brief description of the drawings]
FIG. 1 is a schematic diagram showing a marine propulsion device.
FIG. 2 is a sectional view showing a gas cylinder device.
FIG. 3 is a side view of FIG. 2;
FIG. 4 is a plan view of FIG. 2;
FIG. 5 is an arrow view along the line VV in FIG. 2;
FIG. 6 is a sectional view taken along the line VI-VI in FIG. 5;
FIG. 7 is a sectional view taken along the line VII-VII in FIG. 5;
FIG. 8 is a sectional view taken along the line VIII-VIII in FIG.
FIG. 9 is a hydraulic circuit diagram of the gas cylinder device.
[Explanation of symbols]
10 Ship propulsion machine
11 Hull
15 Propulsion unit (propulsion device)
20 Gas cylinder device
21 cylinder block
22 Piston rod
23 Rod Guide
24 piston
25 Piston rod side oil chamber
26 Piston side oil chamber
31 gas chamber
34-36 connecting route
50 Switching valve device
51 valve case
53 Communication Room
61-63 Poppet valve (check valve)
73 Rotating plate (rotating body)
74 Ball working surface
75-77 balls
91 Thrust washer

Claims (5)

Connecting the cylinder block to one of the hull and the propulsion unit, connecting the piston rod inserted into the cylinder block from the rod guide provided on the cylinder block to the other of the hull and the propulsion unit,
A piston rod side oil chamber on the piston rod housing side and a piston side oil chamber on the piston rod non-housing side are provided in the cylinder block,
A piston rod side oil chamber and a gas chamber which can be connected to the piston side oil chamber are formed integrally with the cylinder block,
In a marine gas cylinder device provided with a switching valve device in a cylinder block capable of switching a communication state between a piston rod-side oil chamber, a piston-side oil chamber, and a gas chamber,
The switching valve device is provided with a check valve that is closed by the hydraulic pressure of the piston rod side oil chamber in a communication path connecting the piston rod side oil chamber to the communication chamber, and a piston is provided in the communication path connecting the piston side oil chamber to the communication chamber. A check valve that closes by the oil pressure of the side oil chamber is provided, and a check valve that closes by the oil pressure of the gas chamber is provided in a communication path that connects the gas chamber to the communication chamber,
The switching valve device allows all the check valves to be opened and closed at a time, and opens all the check valves by an opening operation so that all communication paths can communicate with each other in the communication room, and all the check valves can be closed by a closing operation. A gas cylinder device for ships, characterized in that all the communication paths can be shut off from the communication chamber by closing the check valve. The switching valve device opens a port of each communication path in a communication chamber provided in a valve case, arranges each of the check valves in each of the ports of each communication path, and a ball of a rotating body supported by the valve case. 2. The marine gas cylinder device according to claim 1, wherein a ball is sandwiched between an operating surface and each of the check valves, and each check valve is brought into contact with and separated from a corresponding port via the ball by a rotating operation of a rotating body. Connecting the cylinder block to one of the hull and the propulsion unit, connecting the piston rod inserted into the cylinder block from the rod guide provided on the cylinder block to the other of the hull and the propulsion unit,
A piston rod side oil chamber on the piston rod housing side and a piston side oil chamber on the piston rod non-housing side are provided in the cylinder block,
A piston rod side oil chamber and a gas chamber which can be connected to the piston side oil chamber are formed integrally with the cylinder block,
In a marine gas cylinder device provided with a switching valve device in a cylinder block capable of switching a communication state between a piston rod-side oil chamber, a piston-side oil chamber, and a gas chamber,
The switching valve device communicates the gas chamber with the communication chamber, and provides a check valve that is closed by the hydraulic pressure of the piston rod-side oil chamber in a communication path that connects the piston rod-side oil chamber to the communication chamber. A check valve that closes with the hydraulic pressure of the piston side oil chamber is provided in the communication path that communicates with the communication chamber,
The switching valve device allows all the check valves to be opened and closed at a time, and opens all the check valves by an opening operation so that all communication paths can communicate with each other in the communication room, and all the check valves can be closed by a closing operation. By closing the check valve, all communication paths can be shut off from the communication room,
The switching valve device opens the ports of the respective communication paths in the communication chamber provided in the valve case, and the gas charging pressure is provided in each of the communication path port of the piston rod side oil chamber and the communication path port of the piston side oil chamber. Each check valve with a higher valve opening pressure is arranged, the ball is sandwiched between the ball operating surface of the rotating body supported by the valve case and each of the check valves, and the ball is rotated by the rotating operation of the rotating body. A gas cylinder device for ships, wherein each check valve is brought into and out of contact with a corresponding port. 2. The switching valve device according to claim 1, wherein an opening / closing timing of each check valve in accordance with a rotation operation of the rotating body can be adjusted by adjusting a shape of a ball operating surface of the rotating body and a portion sandwiching the ball of each check valve. Or the gas cylinder device for ships described in 3. 5. The marine gas cylinder device according to claim 1, wherein a thrust washer is interposed between the valve case and the rotating body.

Images